EP1422348B1 - Méthode pour former les noeuds de filets de retenue tels que filets d'éboulis et similaires, noeuds obtenus par la méthode et jonction pour noeud de filet de retenue - Google Patents

Méthode pour former les noeuds de filets de retenue tels que filets d'éboulis et similaires, noeuds obtenus par la méthode et jonction pour noeud de filet de retenue Download PDF

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Publication number
EP1422348B1
EP1422348B1 EP02425710A EP02425710A EP1422348B1 EP 1422348 B1 EP1422348 B1 EP 1422348B1 EP 02425710 A EP02425710 A EP 02425710A EP 02425710 A EP02425710 A EP 02425710A EP 1422348 B1 EP1422348 B1 EP 1422348B1
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EP
European Patent Office
Prior art keywords
rope
knot
junction
bridge
arch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02425710A
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German (de)
English (en)
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EP1422348A1 (fr
Inventor
Vitaliano Russo
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Sincron Srl
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Sincron Srl
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Filing date
Publication date
Application filed by Sincron Srl filed Critical Sincron Srl
Priority to EP02425710A priority Critical patent/EP1422348B1/fr
Priority to AT02425710T priority patent/ATE430839T1/de
Priority to DE60232254T priority patent/DE60232254D1/de
Priority to CA2450112A priority patent/CA2450112C/fr
Priority to US10/716,260 priority patent/US7234283B2/en
Publication of EP1422348A1 publication Critical patent/EP1422348A1/fr
Application granted granted Critical
Publication of EP1422348B1 publication Critical patent/EP1422348B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • E01F7/045—Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04—Mats

Definitions

  • the present invention broadly relates to a method for making a retaining net, of the kind that is employed for example to hold off land and rocks, snow and avalanches, so called rock fences and avalanche fences, and particularly to a method for making a knot of said retaining net, to a knot formed by means of said method and to a junction for said knot.
  • junctions have been devised, being formed by means of two plate-shaped elements located at the opposite ends of the intersection between the two ropes and closed on themselves because of their bending upon each other, with subsequent formation of a sort of boss.
  • These junctions allow to realize the knot in a fast way, by means of tools, which is a relatively simple press.
  • these junctions despite of a series of following improvements, are still unsatisfactory as for their resistance against impulsive stimulus.: for instance a falling rock can determine, because of the impact with the net, the opening of the junction, often with distance projection of one or both the plate-shaped elements, in a projectile style, with immediate widening of at least a mesh of the net and causing danger for people.
  • JP000178925 Another retaining net has been disclosed in JP000178925 , which comprises a first and a second rope crossing over each other and a junction for binding the ropes together, wherein said junction comprises a first and a second U element astride said first rope, with equally oriented wings close to the second rope on opposite sides thereof.
  • This known retaining net is suitable for acting as a direct barrier to or containment of falling rocks or avalanches.
  • the underlying problem of this invention is to provide a method for making retaining net knots, satisfying the above-referred requirement and overcoming drawbacks of the prior art.
  • figure 1 globally shows a retaining net, for retaining land, rocks, snow and avalanches, e.g. a so-called rock fence, according to the invention.
  • the net 1, that can be rolled up into coils of diameter D, comprises a plurality of warp ropes 2 and a plurality of woof ropes 3 crossing one another at right angles in correspondance of knot points 4 to define meshes 5, square-shaped meshes in this example.
  • the net 1 is meant to operate outstretched, for example stretching hillside, in order to protect roads from falling rocks..
  • ropes 2 and 3 extend along directions x-x and y-y respectively, perpendicular to a direction z-z.
  • the ropes 2 and 3 are made of twisted steel strands.
  • each rope has seven strands and each strand comprises seven wires.
  • the ropes 2 and 3 of this example are all identical and have a diameter d of 8 mm.
  • Each knot comprises, besides crossing ropes 2 and 3, a junction 6 binding the ropes together in correspondance of the knot, so as to prevent ropes from detaching and sliding with respect to each other.
  • the junction 6 comprises a first and a second U-shaped elements 7 and 8.
  • the first U element 7 has a curved base 7a, and two parallel wings 7b and 7c, with respective ends 7d and 7e.
  • U element 8 which has a curved base 8a, two parallel wings 8b and 8c, with respective ends 8d and 8f.
  • the curvature of the curved bases 7a, 8a is semicircular, with an intrados radius R being approximately one half the rope diameter d, in this case about 4 millimeters.
  • the two U elements 7 and 8 are positioned side-by-side astride the first rope 2, with their wings equally oriented in the direction z-z, in substance adjacent, at a reciprocal distance approximately equal to d, so that they lie close to the second rope 3 on opposite sides thereof.
  • the junction further comprises at least a bridge element 9, connecting the ends 7d, 7e of the U element 7 to the adjacent ends 8d, 8e of the U element 8.
  • This bridge element 9 is bridge extended on the second rope 3 parallel to the direction x-x of rope 2 and perpendicularly to the direction y-y of rope 3, and it is then clamped on said rope 3 with clamping means globally shown with 10.
  • the bridge element 9 consists of an arch 9d and a yoke 9e, both lying in respective parallel planes and perpendicularly to the direction y-y of rope 3.
  • the arch 9d is formed by a steel cylindrical bar, which is a steel rod, conveniently bent, and it merges with the ends 7d, 8d of the two U elements 7, 8 and is integral with the latter.
  • the curvature of the arch 9d is semicircular with an intrados radius equal to R.
  • This unique piece (see figure 8 ), generally shown with 11, is obtained by bending a steel cylindrical bar, which is a steel rod, whose diameter is dt, and it is preferably zinc-galvanized and it has distance, indicated with h, between tangent line t9 at the intrados of arch 9d and the plane defined by tangent lines t7, t8 at the intrados of curved bases 7a, 8a.
  • the yoke 9e is a steel parallelepiped bar, preferably zinc-galvanized. It has a semicylindrical depression 12 of radius R located midway of its length and faced to the rope 3 and two holes 13, 14 through which it is fit in a sliding way on the legs 7e, 8e of the two U elements 7, 8.
  • the clamping means 10 comprise two thread nuts 15 and 16, preferably zinc-galvanized, which are involved in the screwing with respective screw threads 17 and 18 provided at the ends 7e and 8e.
  • the desired clamping is obtained by tightening up the nuts, thus provoking the pressing contact of the yoke 9e on the rope 3 and, as a reaction, the pressing contact of arch 9d on the same rope.
  • a product against the unscrewing of the screw threads is applied.
  • the threads could be locally deformed by means of burin and hammer.
  • junction 6 comprises clamping means 20 composed of two heads 21 and 22 respectively formed integrally in correspondence of the ends 7e and 8e of the wings 7c, 8c of the U elements 7 and 8. Because of the upsetting the heads 21 and 22 are forced to lean on yoke 9b. Being the heads 21 and 22 practically indestructible, also the clapping means 20 are irreversible, and the junction comes out to be inviolable.
  • a method of making retaining net knots such as rock fences or avalanche fences, wherein a knot consists of a first and a second wire ropes crossing over each other and a binding junction of said ropes, comprises the steps of placing a first and a second U element astride said first rope and close to said second rope on opposite sides thereof, of linking the ends of the first U element to the ends of the second U element by means of at least one bridge element overlying said second rope, and of clamping said at least one bridge element on said second rope.
  • the main advantage of the invention is the high machanical strength reached by the net, both under static and impulsive stimulus: the junction according to the invention holds the ropes together like a ligament where they cross over and it forms a whole which is impossible to be divided into portions.
  • Another advantage is the excellent life expectancy of of the junction, being formed by massive elements.
  • the knot can be formed by means of relatively simple tools, such as presses, with screwers or riveters .
  • the net formed with knots according to the invention has also the advantage of being easily rolled up, also in coils with a small diameter, practically the one of the rope, which is important as far the transport and use while operating is concerned.
  • the junction binds the ropes firmly together without affecting their machanical strength. This is achieved because all the elements of the junction act on the ropes according to geodetic curves perpendicular to the axe of the ropes and to the direction of the rope twisting helix.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Claims (9)

  1. Procédé de fabrication de noeuds de filets de retenue, tels que des barrières pare-pierres et des barrières paravalanches, dans lequel un noeud (4) comprend une première et une deuxième cordes (2, 3) se croisant l'une au-dessus de l'autre et une jonction (6) reliant lesdites cordes dans une zone de croisement donnée, le procédé consistant à : placer un premier et un deuxième éléments en U (7, 8) à cheval sur ladite première corde (2), chaque élément en U ayant une base courbe semi-circulaire (7a, 8a) et la même orientation et étant situé à côté de ladite deuxième corde (3) sur les côtés opposés de chaque élément en U ; relier les extrémités (7d, 7e) du premier élément en U (7) aux extrémités (8d, 8e) du deuxième élément en U (8) au moyen d'au moins un élément de pont (9) recouvrant ladite deuxième corde (3) ; et fixer à l'aide d'un dispositif de fixation ledit élément de pont (9) sur ladite deuxième corde (3), ledit procédé étant caractérisé en ce que le rayon de l'intrados de la base courbe semi-circulaire (7a, 8a) est défini pour représenter environ la moitié du diamètre de la corde et en ce que durant l'étape de fixation à l'aide du dispositif de fixation, les cordes (2, 3) sont pressées l'une contre l'autre en correspondance avec leur zone de croisement, grâce au déplacement des fils de contact, en réduisant leur épaisseur totale d'une valeur comprise entre 1 et 4/3 du diamètre (d) des cordes de telle sorte que les cordes (2, 3) soient amenées sensiblement dans le même plan au niveau de chaque noeud (4) du filet (1).
  2. Noeud (4) d'un filet de retenue (1), tel qu'une barrière pare-pierres ou une barrière paravalanches et des barrières similaires, du type comprenant une première et une deuxième cordes (2, 3) se croisant l'une au-dessus de l'autre et une jonction (6) permettant de relier les cordes ensemble, dans lequel ladite jonction (6) comprend un premier et un deuxième éléments en U (7, 8) à cheval sur ladite première corde (2), avec des ailes orientées de la même façon près de la deuxième corde (3) sur les côtés opposés de chaque élément, un premier et un deuxième éléments de pont (9) reliant les extrémités (7d, 7e) des ailes (7b, 7c) du premier élément en U (7) aux extrémités adjacentes (8d, 8e) des ailes (8b, 8c) du deuxième élément en U (8), et recouvrant la deuxième corde (3) ; et un dispositif de fixation (10, 20) permettant de fixer ledit premier élément de pont (9) sur la deuxième corde (3), caractérisé en ce que le deuxième élément de pont (9) comprend un élément cintré (9d) qui fusionne avec les extrémités adjacentes (7d, 8d) des premier et deuxième éléments en U (7, 8) et qui est solidaire de celles-ci pour former une pièce unique (11) et en ce que ladite pièce unique (11) a une distance donnée (h) mesurée entre la tangente (t9) au niveau d'un intrados de l'élément cintré (9d) de l'élément de pont (9) et le plan défini par les tangentes (t7, t8) au niveau de l'intrados des bases courbes (7a, 8a) du premier élément en U (7) et du deuxième élément en U (8), dans lequel ladite distance donnée (h) est comprise entre 1 et 4/3 du diamètre de la corde (d) et dans lequel le premier élément en U (7) et le deuxième élément en U (8) ont des bases courbes semi-circulaires (7a, 8a) avec un rayon d'intrados (R) qui représente environ la moitié du diamètre de la corde (d) et dans lequel le dispositif de fixation (20) comprend deux têtes (21, 22) formées par rivetage en correspondance avec les extrémités (7e, 8e) des deux ailes (7b, 8b) dudit élément en U (7, 8).
  3. Noeud (4) selon la revendication 2, caractérisé en ce que ledit élément de pont (9) comprend un élément cintré (9d) reliant une extrémité (7d) d'une aile (7b) de l'élément en U (7) à une extrémité adjacente (8d) d'une aile (8b) du deuxième élément en U (8).
  4. Noeud (4) selon la revendication 3, caractérisé en ce que ledit élément cintré (9d) est solidaire dudit premier élément en U (7) et dudit deuxième élément en U (8).
  5. Noeud (4) selon la revendication 2, caractérisé en ce que ledit premier élément de pont (9) comprend un élément d'accouplement (9e) reliant une extrémité (7e) d'une aile (7c) du premier élément en U (7) à une extrémité adjacente (8e) d'une aile (8c) du deuxième élément en U (8).
  6. Jonction (6) permettant de relier deux cordes (2, 3) ensemble pour former un noeud (4) d'un filet de retenue (1), tel qu'une barrière pare-roches ou une barrière paravalanches et des barrières similaires, comprenant un premier et un deuxième éléments en U (7, 8), disposés côte à côte et orientés de la même façon, un premier et un deuxième éléments de pont (9) reliant les extrémités (7d, 7e) du premier élément en U (7) aux extrémités adjacentes (8d, 8e) du deuxième élément en U (8), utilisés pour fermer les éléments en U, et un dispositif de fixation (10, 20) dudit premier élément de pont caractérisé en ce que le deuxième élément de pont (9) comprend un élément cintré (9d) qui fusionne avec les extrémités adjacentes (7d, 8d) des premier et deuxième éléments en U (7, 8) et qui est solidaire de celles-ci pour former une pièce unique (11) et en ce que ladite pièce unique (11) a une distance donnée (h) mesurée entre la tangente (t9) au niveau d'un intrados de l'élément cintré (9d) de l'élément de pont (9) et le plan défini par les tangentes (t7, t8) au niveau de l'intrados des bases courbes (7a, 8a) du premier élément en U (7) et du deuxième élément en U (8), dans lequel ladite distance donnée (h) est comprise entre 1 et 4/3 du diamètre de la corde (d) et dans lequel le premier élément en U (7) et le deuxième élément en U (8) ont des bases courbes semi-circulaires avec un rayon d'intrados (R) qui représente environ la moitié du diamètre de la corde (d) et dans lequel le dispositif de fixation (20) comprend deux têtes (21, 22) formées par rivetage en correspondance avec les extrémités (7e, 8e) des deux ailes (7b, 8b) desdits éléments en U (7, 8).
  7. Jonction (6) selon la revendication 6, caractérisée en ce que ledit élément de pont (9) comprend un élément cintré (9d) reliant une extrémité (7d) d'une aile (7b) du premier élément en U (7) à une extrémité adjacente (8d) d'une aile (8b) du deuxième élément en U (8).
  8. Jonction (6) selon la revendication 7, caractérisée en ce que ledit élément cintré (9d) est solidaire dudit premier élément en U (7) et dudit deuxième élément en U (8).
  9. Jonction (6) selon la revendication 8, caractérisée en ce que ledit élément de pont (9) comprend un élément d'accouplement (9e) reliant une extrémité (7e) d'une aile (7c) du premier élément en U (7) à une extrémité adjacente (8e) d'une aile (8c) du deuxième élément en U (8).
EP02425710A 2002-11-19 2002-11-19 Méthode pour former les noeuds de filets de retenue tels que filets d'éboulis et similaires, noeuds obtenus par la méthode et jonction pour noeud de filet de retenue Expired - Lifetime EP1422348B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP02425710A EP1422348B1 (fr) 2002-11-19 2002-11-19 Méthode pour former les noeuds de filets de retenue tels que filets d'éboulis et similaires, noeuds obtenus par la méthode et jonction pour noeud de filet de retenue
AT02425710T ATE430839T1 (de) 2002-11-19 2002-11-19 Verfahren zum herstellen der knoten von schutznetzen, insbesondere steinschlagnetzen und dergleichen, durch das verfahren hergestellte knoten und verbindung für schutznetzknoten
DE60232254T DE60232254D1 (de) 2002-11-19 2002-11-19 Verfahren zum Herstellen der Knoten von Schutznetzen, insbesondere Steinschlagnetzen und dergleichen, durch das Verfahren hergestellte Knoten und Verbindung für Schutznetzknoten
CA2450112A CA2450112C (fr) 2002-11-19 2003-11-17 Methode de realisation de noeuds pour filets de retenue tels que filets de retenue de roches et autres du meme genre, noeud obtenu par cette methode et liaison pour un noeud de filet de retenue
US10/716,260 US7234283B2 (en) 2002-11-19 2003-11-18 Knot of a retaining net

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425710A EP1422348B1 (fr) 2002-11-19 2002-11-19 Méthode pour former les noeuds de filets de retenue tels que filets d'éboulis et similaires, noeuds obtenus par la méthode et jonction pour noeud de filet de retenue

Publications (2)

Publication Number Publication Date
EP1422348A1 EP1422348A1 (fr) 2004-05-26
EP1422348B1 true EP1422348B1 (fr) 2009-05-06

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EP02425710A Expired - Lifetime EP1422348B1 (fr) 2002-11-19 2002-11-19 Méthode pour former les noeuds de filets de retenue tels que filets d'éboulis et similaires, noeuds obtenus par la méthode et jonction pour noeud de filet de retenue

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US (1) US7234283B2 (fr)
EP (1) EP1422348B1 (fr)
AT (1) ATE430839T1 (fr)
CA (1) CA2450112C (fr)
DE (1) DE60232254D1 (fr)

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Publication number Priority date Publication date Assignee Title
US7726634B2 (en) * 2006-12-07 2010-06-01 Newport News Shipbuilding And Dry Dock Company System and method for tensioning and locking a safety strand
US9695613B2 (en) * 2009-09-14 2017-07-04 C. E. Shepherd Company, L.P. Wire-mesh security fences, methods and systems and fence panels
US20140353564A1 (en) * 2009-09-14 2014-12-04 C.E. Shepherd Company, L.P. Wire-Mesh Security Fence and Fence Panel
US20110115221A1 (en) * 2009-11-17 2011-05-19 Charlotte Kaplan Decorative knot sequence and method for its formation
US20130269281A1 (en) * 2011-08-22 2013-10-17 Robert J. Stanton Protective Enclosure for a Wellhead
US9052038B2 (en) * 2013-06-13 2015-06-09 Mueller International, Llc Sway brace retaining clip
JP2015078485A (ja) * 2013-10-15 2015-04-23 日本プロテクト株式会社 ワイヤロープ締結金具
JP6561470B2 (ja) * 2015-01-14 2019-08-21 ゼン技研株式会社 鉄筋交差部締結具
JP6544514B2 (ja) * 2015-04-20 2019-07-17 ゼン技研株式会社 鉄筋交差部締結具
CL2019001602A1 (es) * 2019-06-11 2019-10-18 Garibaldi S A Sistema de panel para la contención de estallidos de rocas o derrumbes en túneles mineros y obras viales formado por un bastidor solidario a una red de flejes cuyos nodos están unidos por hebillas de conexión; y procedimiento de instalación.
CN111502044B (zh) * 2020-04-28 2021-05-28 无锡锡晟建设有限公司 一种顶板沉降后浇带附加层钢筋结构
US20220178093A1 (en) * 2020-12-09 2022-06-09 Southwest Jiaotong University Throwing Toughness Buffer Mesh Unit for Rockfall Protection and Design Method of Critical Throwing Angle Thereof

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US806721A (en) * 1905-03-27 1905-12-05 Bert B Wood Wire fence.

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US1781458A (en) * 1930-03-08 1930-11-11 Gore Thomas Means for securing together two intersecting strands
US2079034A (en) * 1936-05-09 1937-05-04 Harry M Parkin Nonslip ratline clamp
US2929121A (en) * 1958-06-04 1960-03-22 George A Tinnerman Clamps
US6347903B1 (en) * 1998-04-14 2002-02-19 George Stuart Knighton Fly clamp for reinforcing bars in concrete construction
JP2000178925A (ja) * 1998-10-05 2000-06-27 Tesac Corp リングネット式落石防止装置

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US806721A (en) * 1905-03-27 1905-12-05 Bert B Wood Wire fence.

Also Published As

Publication number Publication date
DE60232254D1 (de) 2009-06-18
CA2450112C (fr) 2012-09-04
ATE430839T1 (de) 2009-05-15
US20040149976A1 (en) 2004-08-05
CA2450112A1 (fr) 2004-05-19
US7234283B2 (en) 2007-06-26
EP1422348A1 (fr) 2004-05-26

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